Annals of the South African Museum: Annale Van Die Suid-Afrikaanse MuseumWest, Newman & Company for the trustees of the Museum, 1991 - Natural history |
From inside the book
Results 1-3 of 5
Page 15
... probably close to the interval 30-60 m ( see Fig . 2 ) . Irregular U - tubes up to 2 cm in diameter , with the limbs of the tube up to 7 cm apart , occur 48 m from the base of the Sardinia Bay Formation . Spreiten can be discerned ...
... probably close to the interval 30-60 m ( see Fig . 2 ) . Irregular U - tubes up to 2 cm in diameter , with the limbs of the tube up to 7 cm apart , occur 48 m from the base of the Sardinia Bay Formation . Spreiten can be discerned ...
Page 20
... probably worms ( Nicholson 1873 ; Häntzschel 1975 : W95 - W97 ) . The indistinct walls suggest the host sediment and burrow - fill were identical in composition and that the burrowing activities may have taken place in a soupy mud ( cf ...
... probably worms ( Nicholson 1873 ; Häntzschel 1975 : W95 - W97 ) . The indistinct walls suggest the host sediment and burrow - fill were identical in composition and that the burrowing activities may have taken place in a soupy mud ( cf ...
Page 23
... probably typical of epeiric sea deposits . Small fluctuations in relative sea - level might accomplish large lateral shifts in the boundaries of depositional environ- ments , because of the extremely low bottom gradients involved . The ...
... probably typical of epeiric sea deposits . Small fluctuations in relative sea - level might accomplish large lateral shifts in the boundaries of depositional environ- ments , because of the extremely low bottom gradients involved . The ...
Other editions - View all
Common terms and phrases
abbreviated bioturbated burrow fill callianassid decapods Cape Town Chondrites cm Fig cm in diameter colonization by sediment-dwellers correlation cross-section Cruziana ichnofacies model currents and waves decapods depositional environment Description Differential weathering Diplocraterion disseminated pyrite EARLY ORDOVICIAN SARDINIA Ekdale epeiric sea FACIES INTERPRETATIONS Fascifodina Figure Frey & Pemberton Gastropoda Häntzschel 1975 holotype ichno ichnogenus indicate INNER SHELF MEGARIPPLE INNER SHELF MUD INNERMOST SHELF MUD interval Irregular U-tubes Leda MUD AND SAND Mudrock units namacolus occur Ophiomorpha paper paratypes parentheses Pemberton 1984 Port Elizabeth punctuation quartzite references relict sedimentary structures Restricted biota rocks Roman numerals sandstone sole Sardinia Bay Formation scientific name sediment sediment-dwelling organisms sedimentary structures Seilacher 1967 shafts shallow marine Shone shoreface Skolithos ichnofacies Skolithos tubes sole marking SOUTH AFRICAN MUSEUM Spreiten demarcated sub-horizontal Synonymy Table Mountain Group Thalassinoides tidal currents trace fossil assemblages trace fossil association traces resembling Upper Sardinia Bay V-shaped pattern Vermiform sand-filled tubes vertical burrows